Double-Axis butterfly valve 1.Medium:Water,Oil,Vapour 2.Material:Cast iron,Ductile ... : API598 , ISO5208-1982Driving style : Lever , gearbox , pneumatic actuator, electronic actuator , Hydraulic actuator.Name:ValvesMaterials : 1.Body : GG25, GGG40, S.S304, WCB2 ... .S416.4.Seat : EPDM , NBR, PTFE , VITON . Double-axis butterfly valve